| Pen-y-Bont ar Ogwr to Cocentaina | 894.73 mi (1,439.93 km) |
| Pen-y-Bont ar Ogwr to Coin | 1,026.99 mi (1,652.78 km) |
| Pen-y-Bont ar Ogwr to Colindres | 560.41 mi (901.90 km) |
| Pen-y-Bont ar Ogwr to Collado-Villalba | 751.59 mi (1,209.57 km) |
| Pen-y-Bont ar Ogwr to Colmenar Viejo | 749.60 mi (1,206.36 km) |
| Pen-y-Bont ar Ogwr to Colmenarejo | 756.61 mi (1,217.65 km) |
| Pen-y-Bont ar Ogwr to Conil de la Frontera | 1,060.21 mi (1,706.25 km) |
| Pen-y-Bont ar Ogwr to Consuegra | 832.25 mi (1,339.38 km) |
| Pen-y-Bont ar Ogwr to Corbera de Llobregat | 744.32 mi (1,197.87 km) |
| Pen-y-Bont ar Ogwr to Cordoba | 943.05 mi (1,517.69 km) |
| Pen-y-Bont ar Ogwr to Coria del Rio | 990.17 mi (1,593.53 km) |
| Pen-y-Bont ar Ogwr to Crevillente | 925.88 mi (1,490.07 km) |
| Pen-y-Bont ar Ogwr to Cuarte de Huerva | 697.12 mi (1,121.90 km) |
| Pen-y-Bont ar Ogwr to Cubellas | 753.76 mi (1,213.06 km) |
| Pen-y-Bont ar Ogwr to Cuellar | 699.14 mi (1,125.16 km) |
